Process for treating building material.



JOHN H. HAMLIN, OLE SALT LAKE CITY, UTAH.

PRQCESS FOR TREATING BUILDING MATERIAL.

No Drawing.

Specification of Letters Patent.

Application filed January 15. 1913.

Patented June 2, 1914..

Serial No. 742,271.

To all whom 2'15 may concern:

Be it known that 1, JOHN H. HAMLIN, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake and State ofUtah, have invented certain new and useful Improvements in Processes for'lreating Building Material, of which the following is a specification.

My invention relates to a process for treating a stone or brick wall,and has for its object to provide a. process for surface treating stone(either natural or artificial), brick, terra cotta or other buildingmaterial, either before or after it is placed in the Wall, to render itwaterproof, without altering the form, appearance or usefulness.

The process consists of crushing and granulating, to the same finenessas the grains of the stone, some pieces of like or similar stone. 1 usethe same class of ma tcrial as that used in the wall, in order that thetreated stone or wall will have its original color and appearancerestored and re" tained. This powdered or granulated raw material issaturated with a transparent, water-proof chemical fluid containing somerubber and which is cementitious in its nature and properties and isinsoluble in water. The saturated, emulated material is stirred into aplastic mass and is then heated and vulcanized, which treatment willleave it in larger sized lumps of irregular shape and friable. Eachindividual particle thereof will be coated or plat/ed with a transparentwater-proof material, so that when again crushed and granulated, whichis the next step in the process, each small particle will be surroundedwith a film or coating of a waterproof substance which is transparent.

The stone to be treated, preferably after it is placed in the wall, isgiven a primary coating of an adhesive chemical solution, such asvarnish sizing or glued calcimine to which the above describedgranulated and prepared material will adhere and integrally fuse whenallowed to dry thereon. The said granulated material is then applied byblowing or spraying it with compressed air to form a secondary coatingon the previously prepared surface of the wall to be treated andadhering thereto will, when dry, give to said wall so treated the exactappearance of the original wall or stone, but said wall or stone willhave a water-proof surface, and being water-proof will not absorbmoisture and be discolored by stains, soot, dust or other matter whichdisfigures our buildings. When the plating or veneering has set anddried, which will take about five days, the wall will not be subject toabsorption, freezing, thawing and will not disintegrate.

I am aware that others have coated walls and building material with asticky cementitious material and applied sand thereto, by means of acompressed air blast, to coat said wall with a stone appearing material.

The new and novel features of my process are the water-proof nature andtransparency of the coating on the granulated material, and the use ofthe same stone particles or brick or other material of which the wallwas originally built; thereby not changing the appearance of the wall,and at the same time placing it in such condition that it will retainits original appearance.

My treatment is the reverse of the sand blast process of restoring theoriginal color and appearance of a wall, which consists of cutting awaythe discolored surface of the wall by a blast of sharp sand, while myprocess coats the wall with an impervious plating or veneers ofwater-proof similarly colored material. If the wall is built of granite,powdered granite, which has been previously treated with the transparentwater-proof liquid, applied to the adhesive wall, and if gray sand stoneis in the wall,

gray sand stone is used.

Having thus described my process I desire to secure by Letters Patentand claim 1. The herein described process of treating walls and buildingmaterial, consisting of applying an adhesive chemical solution to thematerial to be treated as a primary coating, and then before the samehas been allowed to set or dry to. apply a secondary coat of apreviously prepared granulated material, which has been made water-proofby a transparent chemical solution.

2. The herein described process for treating walls and buildingmaterial, consisting of applying an adhesive chemical solution to thematerial to be treated, to which a blast l have been previously coatedwith a trans- 0 of granulated material is applied which ma- 3 parentwater-proof chemical.

terial has been rendered water-proof by ap- In testimony whereof I hayeafiixed my plying a transparent chemical solution signature in presenceof two witnesses.

3. A process and method for treating walls consisting of coating thewall with an adhe- 'W'itnesses: sive solution, and then covering saidcoated SAM. RANEY,

R. B. MCINTOSH.

theretoi A JOHN H. HAMLIN. wall with minute particles of stone which I

